Best 2-2-2-4 direct burial aluminum wire

Top pick: NassauNationalCable 2-2-2-4 Dyke Quadruplex URD — it's the real thing for this job: aluminum quadruplex rated for direct burial at 600V, with 155A allowable in the ground and 115A in duct, so it suits a 100–125A subpanel feed to a shop, garage or outbuilding. Buy it in the length you need rather than a fixed coil.

Who the others suit:

• Nassau 2-2-2-4 Mobile Home Feeder — same conductors, sold as service-entrance feeder; good if you're feeding a mobile home or panel where the run is in conduit or protected, not bare in soil.
• Wire America 2-2-2-4 Quadruplex URD — a straightforward URD spool from a wire specialist if you want a single-source supplier.
• Relaxweex 25 ft — short runs only, like a meter-to-panel or a small outbuilding.
• Best Wire & Cable 2-2-2-4 — the budget entry point; confirm the burial rating and length before you commit.

Check the ampacity and burial depth against your local code and inspector — direct-burial depth requirements vary.